Elevator-door



No."749,395. PATENTED JAN. 12, 1904.

E. MQOLUREJ ELEVATOR'DOOR.

APPLIUATION FILED DBO. 19, 1902.

N0 MODEL.

m: urinals Farms 00 mm'ouma, WASHINGTON, a. c.

UNITED STATES Patented January 12, 1904.

PATENT OFFICE.

- EDWARD MGCLURE, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO FRANKLINP. SMITH, OF CHICAGO, ILLINOIS.

ELEVATOR-DOOR.

SPECIFICATION forming part of Letters Patent No. 749,395, dated January12, 1904.

Application filed December 19, 1902. Serial No. 135,864. (No model.)

i I To all, whom it may concern:

Be it known thatI, EDWARD MoCLURn, a citizen of the United StatesofAmerica, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inElevator-Doors, of which the following is a specification.

My invention relates to certain new and useful improvements inelevator-doors; and its objectis to produce a device of the classwherein one of two sliding doors moves behind the other, both doorsbeing moved by any force acting on one of them.

To this end my invention consists in certain novel features ofconstruction, which are clearly illustrated in the accompanying drawingsand described in this specification.

In the aforesaid drawings, Figure 1 is an elevation of my improved doorslooking from the inside of the elevator-well. Fig. 2 is a horizontalsection in the line 2 2 of Fig. 1; and Fig. 3 is a view similar to Fig.1, showing the doors open. l

Referring to the drawings, A and B are two sliding doors running onhangers a and 6, respectively. Both doors slide to the right, looking atthem as in Fig. 1, and the door A in that position slides behind thedoor B. The door A is provided with a rail A toward the lower part ofits left-hand edge, the rail form ing with the contiguous edge of thedoor A a vertical guideway.

C indicates the wall of the inclosure, having the doorway which thedoors are adapted to close. A lever D is pivoted between its ends by apivot I) on the door B, which will hereinafter be called the slow door.The left-hand end of the lever D is curved downward and is provided atits lower end with a roller d, running in the guideway formed betweenthe rail A and the contiguous edge of the door A or fast door. To a barC of the wall C is pivoted a link E by means of a pivot c, and theopposite end of this link E is pivoted to the right-hand end of thelever D by a pivot e.

ver D is pushed downward and the doors are pushed to the right, theroller d travels down the guideway, thereby raising the pivot c. Thisangular motion of the lever tends to draw the pivot of the lever D onthe slow door into the same vertical line with the roller d and guidewayon the fast door, and it also tends to draw together the pivot e and thepivot D, thereby drawing the slow door toward the wall. The result ofthis is that after the door is started the two doors move together andreach a wide-open position at the same time, the door A moving at doublethe speed of the door B. The particular advantage of this device lies inthe fact that the levers lie when the door is closed in the line ofmotion, and therefore lock the door shut without any looking means.

I realize that considerable variations can be made in the details ofthis construction, and I-do not, therefore, desire to limit myself tothe specific form herein set forth.

I claim as new and desire to secure by Letters Patent- 1. Thecombination with a wall having a doorway therein, of two doors slidableone behind the other and both behind the wall, of a lever pivoted on theslow door, a substantially vertical guideway upon one of the extremeparts engaging with the lever, and a link connecting the lever with astationary pivot upon the other extreme part, substantially as de- Iscribed.

2. In a device of the class described, the combination with a suitablewall having a doorway and a plurality of doors adapted to close thedoorway and slidable one behind the other to open the same, of a leverfulcrumed between its ends, upon the slow door, and having one end inrunning engagement with the fast door, and a link connecting theopposite end of the lever with the Wall.

In witness whereof I have signed the above application for LettersPatent, at Chicago, in the county of Cook and State of Illinois, this13th day of December, A. D. 1902.

EDWARD MoCLURE.

Witnesses:

CHAS. O. SHERVEY, RUSSELL WILES.

